Telephone relay or repeater.



C. D. MORRIS.

TELEPHONE RELAY 0R REPEATER.

APPLICATION FILED 00T.10,- 1910.

1,033; 1 14. Patented July 23, 1912.

2 SHEBTS-SHEET 1.

Inventor,

I W I I 7/ Witnesses Attorneys.

C. D. MORRIS.

TELEPHONE RELAY 0R REPEATER.

APPLICATION FILED 0CT.10, 1910. 1,Q33,1 14, Patented July 23, 1912.

2 SHEETS-SHEET 2.

E E Z L I g ara/71 nven Or, by. l I

Attorneys.

UNITED ES PATENToFFIoE.

CHARLES 1). MORRIS, or WASHINGTOLL'DISTRICT or COLUMBIA, Ass GNoR or THREE- FIFTHS T0 WILLIAM 1). JUNKIN, or SPOKANE, WASHINGTON, AND ONE-FIFTH '10 7 JOSEPH Bi SWINBURNE, or WASHINGTON, DISTRICT or COLUMBIA;

TELEPHONE RELAY on REPEATER.

To all whom "it concern: 7

Be it known that I, CHARLES D. MORRIS,

a citizen of the UnitedStates,fresiding at" Washington, in the District of Columbia,

have invented a new and useful Telephone Relay or Repeater,- of which the followlng 1s a specification.

This inventionrelates to relays or repeat ers for use in long distance telephony, its primary object beingth'e provlsion of a relay transmitter ut-ilizlng both a fixed-and a movable electrode in connection with inter-v posed granularcarbon, and. whereby the vibrations are accurately repeated and transmitted by the relay, and the sounds produced at the receiving station areperfectly clear and free of the harshness or rasping quality "of tone so noticeable in long distance telephony where the vibrations .are transmitted through one or more relays each of which has two movable electrodes. I

A further object is to providea relay With the foregoing and other objects in view whichwill appearas the desoription proceeds, the inventlon resides 1n the combination and arrangement of parts and in .the details of constructionhere lnafter described and claimed, it being understood that changes in the preoise'embodlment jof invention herein disclosed c be made wlth- 'in the scope of what is claimed without departin from the spirit of the invention.-

-In t e accompanying drawings the preferred form of the invention has been shown. In said drawings :Figure 1 is a plan view of the relay with its cap removed and the-upper binding post in section. I Fig. 2 is a central vertical section through the com? plete relay, the transmitter and the electromagnet being shown in elevation. Fig. 3 is;

a plan view of the casing of the relay and, of those parts within the casing and below the diaphragm. Fig. 4 is an'enlarged central vertical section through the transmitter of the relay. I

Referring to the figures by characters of Specification of Letters Patent.

Patented July as, 1912.

7 Application filed October 10, 1910. Serial No. 586,278.

- reference 1 designates a casing preferably cylindrical and formed of fiber, this casing "being lined with aluminum or other suitable material, such as indicated at 2 for the purpose of shielding the contents of the casing from the influence of external magnetic waves. -A. ttaching brackets 3 may be extended from the casing l and said casing K may be provided, around its upper or open end portion, with an exteriorchannel 4 for the reception of theflange '5 formed upon the cap 6 of the casing. I

A laminated permanentmagnet 7 is secured within the casing 1 and has high reslstance elect-ro-magnets 8 mounted upon the poles thereof, these electro-magnets being electrically connected, as by means of conductors 9, to binding posts 10 and 11 secured upon t-hecasin'g l asshown.

A. diaphragm 12 of any preferred con- I structlon and material or materials, bears,

at its periphery upon the casing 1 and is clamped thereonby means of arcuate hold- 'lng strlps 13 attached to the casing by screwsor the like extending through the marginal portion of the diaphragm. These strips 13 are spaced apart at their ends'so as tdreceive between them the thickened end port-ioris'14 of a bridge 15 extending dia metrically across the casing and diaphragm and havingja central upwardly off set por-..

diaphragm 12. y

A transmitterbutton 17 is arranged within the central off-set formed by the bridge and comprises a fixed electrode 18 mounted tion. 16' located opposite the center of-the within an inverted,cup-like'member .19, there being a stem 20 projecting from said memher and into a sleeve-21, where it is secured by means of a set screw 22'or the like. Said sleeve has a reduced. tubular extension 23 extended through the'bridge and insulated therefrom by rings of mica oriother suitable material such 'as indicated at 24. The free end of'the extension 23 is preferably screwthreaded so as tobe engaged by a nut 25 whereby the sleeve 21 and insulation may be securely held relative to the bridge.

A ring 26 is screwed into'the open end of the member 19 and'supports a diaphragm 27 of mica or other desiredinsulatmg material, this diaphragm carrying the movable Fig. 4 is preferably made up of two disks 28 secured upon opposite faces of the diaphragm 27 and also connected together, as by means of screws 29, one of the disks having a stem 30. Said stem projects through and is secured to the center of the diaphragm 12 and has a conductor 31 secured to it and extending to a binding post 32. This binding post extends from the bridge 15 and is suitably insulated therefrom. The sleeve 21, which practically constitutes a part of the fixed electrode 18 is electrically connected, as by a conductor 33 to a binding post 34 similar to the post 32 and which is insulated from the bridge 15. The two binding posts 32 and34 project through the cap 6 and are engaged by nuts 35 for securing the cap upon the casing 1. The binding nuts 36 are of course mounted on the terminals of these posts for the purpose of con-\ necting these conductors to the posts.

It is of course to be understood that the space between the electrodes 18 and 28 is to be filled with granular carbon such as ordinarily employed in telephone transmitters.

What is claimed. is

1. A telephone relay including a casing, a lining therein for shielding the contents of the casing from the influence of external magnetic waves, a diaphragm secured upon the casing, a laminated permanent magnet within the casing, electro-magnets connected to the poles of the permanent magnet for vibrating the diaphragm, a bridging device secured upon the casing,,and a transmitting button carried by said device and including an electrode 'fixed relative to said device, a movable electrode connectedto and movable with the diaphragm, and a granular conducting material interposed between the electrodes.-

2. A vtelephone relay including a casing, a lining therein for shielding the contents of the casing from the influence of external magnetic waves, a laminated permanent magnet Within the casing, a diaphragm, electromagnets secured to the poles of the permanent magnet for vibrating the diaphragm, a transmitting button mounted within-the casing and including a fixed electrode', an electrode movable with the diaphragm, and a variable resistance material interposed between the electrodes.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two Witnesses.

CHARLES D. MORRIS. 

